This is from 2017. "Published on 25 Feb 2017 Mponeng is a gold mine in South Africa's Gauteng province. It extends over 4 kilometres below the surface and is considered to be one of the most substantial gold mines in the world. It is also currently the world's deepest mine. The trip from the surface to the bottom of the mine takes over an hour. Video link: South Africa World's Deepest Gold Mine Construction - Full Documentary.